Ambbose s



(No Model.)

A. S. VOSE.

TRY AND BEVEL SQUARE. V

Patented July 6, 1886.

WITNBSZSES C aim, M

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.lttorney UNITED STATES a PATENT O FFICE.

AMBROSE S. VOSE, OF WINDSOR, VERMONT.

TRY AND BEVEL SQUARE.

SPECIFICATION forming part of Letters Patent No. 345,196, dated July 6,1886.

Application filed February 8, 1886. Serial No. 191,195. (No model.)

To all whom it may concern:

Be it known that I, AMBROSE S. VosE, a citizen of the United States, anda resident of Windsor, in the county of Windsor and State ofVermont,have invented certain new and use-v ful Improvements in Try and BevelSquares; and I do hereby declare that the following is a full, clear,and exact description of the invention, which will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, which form a part of thisspecification, and in which-- Figure l is a view of my improved beveland try square. Fig. 2 is a View of the square provided with thecentering device. Fig. 3 is a view showing the square provided with thescratch-awl for striking circles. Fig. 4 is a longitudinal sectionalview of the stock, disk, and rule of the square. Fig. 5 is a perspectiveview of the turning-disk, and Fig. dis a view of the scratch-awl.

Similar letters of reference indicate corresponding parts in all thefigures.

My invention has relation to bevel and try squares; and it consists inthe improved construction and combination of parts of such a squareprovided with means for finding the center of circles or cylinders andfor describing circles of different radii, as hereinafter more fullydescribed and claimed.

In the accompanying drawings, the letter A indicates the stock, one end,B, of which is rounded in the shape of a semi-circle, while the otherend is provided at one edge with a spirit-level, G, and with alongitudinal perforation, D, opening at the end for the reception of ascratch-aw], E, when the latter is not in use. The rounded end or headof the stock is formed at one side with a circular or annular rim,F,which is graduated or divided into the degrees of the circle, andinside of this graduated rim the head is formed with a circular recess,G, which communicates with a similar recess, H, upon the other side ofthe stock by a circular perforation, I, of a smaller diameter than therecesses. Two disks, J and K, fit into the recesses, and the lower disk,K, is formed with a reduced portion, L,which jects above the surface ofthe stock, while the lower disk is flush with the lower surface, and theprojecting portion of the disk is provided with a slot or recess, 1?,entering from the edge of the disk and extending through onei half ofthe disk, the inner edge of the said slot being the diameter of the diskpassing through its center. A blade or rule, Q, having its edgessuitably subdivided or graduated, slides in this slot, and the upperside of the rule is provided with a V-shaped longitudinal groove, B,into which the conical inner end of a set-screw, S, may fit, the saidsetscrew passing throughthe outer side of the slot at the upper side ofthe disk. The rule may thus be adjusted by means of its set-screw in theslot, and the angles formed between the edges of the stock and the edgesof the rule may be read upon the annular rim upon the stock, and therule may be adjusted and secured to stand with its edges at any desiredangle to the edges of the stock by tightening the screw connecting theturning disks, draw,- ing them together, and thus clamping the annularlip separating the two recesses in stock.

An arm, T, having one straight edge, U, has aslot, V, in its inner end,which slot has its; inner endat an angle of one hundred and thethirty-five degrees to the straight edge, andone side of the slot isformed with a perforation, W, through which passes a set-screw, X,having a conical point which fits in the groove of the rule.

By setting the rule to form an angle of fortyfive degrees, with itsinner edge tothe edge of the'stock, and securing the arm upon the rulewith its inner end bearing against the stock the straight edge of thisarm will stand at a right angle to the edge of the stock, and

when the edges of the stock and of the arm are brought to bear astangents against the edges of a circle, or against the sides of acylinder, the inner edge of the foot-rule will pass through the centeror axis of the same, so that by describing two lines with the said rule,the arm and stock being tangential to the circle or cylinder, the centeror axis of the circle or cylinder will be accurately located in thepoint where the lines intersect.

Aclamp, Y, having downwardly-projecting lips Z-Z atits ends which bearagainst the edges of the rule, slides upon the same, and is providedwith a set-screw, A, passing through one lip and bearing against theedge of the rule for the purpose of adjusting it, while the other lip isformed with a vertical perforation, B, through which passes thescratch-awl E, which may be secured by a set-screw, D, passing throughthe lip.

A small point, E, may be inserted in the center of the lower disk forthe purpose of retaining it in one place, when placed upon the same, andby adjusting the clamp with the scratch-awl at the desired radius therule may be turned around the center formed by the small point, and theawl will describe a circle around the center of the desired radius. Inthis manner the device may be used as a common bevel and try square, thespirit-level assisting in finding the desired pitch for roofs,road-grades, or any other inclines where it is desirable to define anincline to the horizontal plane.

The arm with the inclined slot will serve to locate centers and axes ofcircles and cylinders, and the scratch-awl will adapt the device to beused as a pair of compasses for describing circles, the device being inthis manner applicable to a great variety of uses.

The lower end of the scratch-awl is cut away at one side to form ashoulder, F, which may bear against the upper side of the rule, thesemi-cylindrical or semi-conical lower end of the awl bearing with itsflat side against the edge of the rule, so that the point of the awlwill be directly in a line with the edge of the rule.

Having thusdeseribed my invention, I claim and desire to secure byLetters Patent of the United States- 1. In a bevel and try square, thecombination of a stock having two registering circular recesses in thesides of one end connected by a circular perforation of a smallerdiameter, a disk fitting and turning in one recess, and having a reducedportion fitting in the aperture, a disk having its inner side bearingagainst the end of the reduced portion of the other disk and fitting inthe other recess, and having the rule or blade secured to it, and ascrew securing the disks together passing through both of them, as andfor the purpose shown and set forth. I

2. In a bevel and try square, the combination of a stock having tworegistering circular recesses in the sides of one end connected by acircular perforation of a smaller diameter, a disk fitting in onerecess, and having a reduced portion fitting in the perforation, and apin' projecting from the inner side of the reduced port-ion, a diskfitting in the other recess and having a perforation in its inner facefor the reception of the pin of the other disk, and having the rule orblade secured in it, and a screw passing through the disks securing themtogether, as and for the purpose shown and set forth.

3. In a bevel and try square, the combination of a stock, a diskrevolving adj ustably in the end of the stock, and having one endprojecting above the face of the stock, and formed with a slot enteringfrom the edge, and having its inner edge passing diametrically throughthe disk, a rule sliding in the said slot and having a longitudinalV-shaped groove in one side, and aset-screw passing through the diskinto the slot, having its inner end conical and 'fitting in the grooveof the rule, as and for the purpose shown and set forth.

4. In a bevel and try square, the combination'of a stock, a rule slidingadjustably in a turning-disk in the stock and passing with its inneredge through the center of the disk, and an arm having one straightedge, and having a slot in its inner end, with the inner edge forming anangle of one hundred and thirty five degrees to the straight edge, andsliding with the said slot upon the outer edge of the rule, as and forthe purpose shown and set forth.

5. In a bevel and try square, the combination of a stock, a disk turningadjustably in the end of the stock, a rule sliding adj ustably in theend of the disk, having its inner edge passing through the center of thedisk, and an arm having a straight edge, and having a slot in its innerend,with its inner edge at an angle of one hundred and thirty-fivedegrees to the straight edge, and sliding with the said slot upon theouter edge of the rule, having a setscrew for adjusting it, as and forthe purpose shown and set forth.

6. In a bevel and try square, the combination of a stock, a disk turningadjustably in the end of the stock, and having a small point in thecenter of its under side, a rule sliding adjustably in the disk,with itsinner edge passing through the center of the disk, a clamp havingdownwardly-projecting lips bearing against the edges of the rule, andhaving a setscrew bearing against one edge of the rule passing throughone lip, and a scratchawl having one-half of its lower end cut away toform a shoulder bearing against the upper side of the edge of the rule,the awl passing through a vertical perforation in the lip of the clamp,and having a set-screw adjusting itin the same, as and for the purposeshown, and set forth.

7. In a bevel and try square, the combination of a stock, a disk turningadjustably in the end of the stock, and having one end pro- ICC IIC

jecting above the face of the stock, and formed with a slot entering atthe edge and passing with its inner edge through the center of the disk,and a rule sliding adjustably in the said 5 slot, with itsinner edgebearing against theinner edge of the slot, as and for the purpose shownand set forth.

In testimony that I claim the foregoing as my own I have hereuntoaffixed my signature in presence of two witnesses.

AMBROSE S. VOSE. Witnesses:

GILBERT A. DAVIS, GEO. E. WILLIAMS.

